Heat sink

• US 20070297183A1
• Filed: 06/21/2006
• Published: 12/27/2007
• Est. Priority Date: 06/21/2006
• Status: Active Grant

• Current Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Coushaine, Charles M.
• Granted Patent: US 7,682,052 B2
• Time in Patent Office: Days
• US Class Current: 362/373
• CPC Class Codes: F21K 9/20 Light sources comprising attachment means
• CPC Class Codes: F21S 45/43 using gas
• CPC Class Codes: F21V 29/60 characterised by the use of a forced flow of gas, e.g. air
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 23/467 by flowing gases, e.g. air H01L23/473 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

An LED lamp has a housing comprising a heat conductive body arrayed about a longitudinal axis with a tubular projection extending therefrom coaxial with the longitudinal axis. The tubular projection has a distal end attached to the heat conductive body and a proximal end opposite thereto. A motor is positioned within the tubular projection and has a tubular, vaned fan blade operatively connected thereto. A plurality of LED components is attached to an outside surface of the tubular projection at the proximal end. An air inlet is formed at the proximal end of the tubular projection and a plurality of air outlets are spaced about the tubular projection between the distal end of the tubular projection and the LED components. A base is operatively attached to the housing for attachment to a power supply.

Claims

1. An LED lamp comprising:

a housing comprising a heat conductive body arrayed about a longitudinal axis with a tubular projection extending therefrom coaxial with said longitudinal axis, said tubular projection having a distal end attached to said body and a proximal end opposite thereto;

a motor positioned in said tubular projection having a tubular, vaned fan blade operatively connected thereto;

a plurality of LED components attached to an outside surface of said tubular projection at said proximal end thereof;

an air inlet at said proximal end of said tubular projection and a plurality of air outlets spaced about said tubular projection; and

a base operatively attached to said housing for attachment to a power supply.

2. The LED lamp of claim 1 wherein said air outlets are positioned between said distal end of said tubular projection and said LED components.

3. The LED lamp of claim 1 wherein heat conductive body is substantially conical.

4. The LED lamp of claim 3 wherein a plurality of heat radiating fins project from said heat conductive body.

5. A heat sink comprising:

a housing comprising a heat conductive body arrayed about a longitudinal axis with a tubular projection extending therefrom coaxial with said longitudinal axis, said tubular projection having a distal end attached to said body and a proximal end opposite thereto;

a motor positioned in said tubular projection having a tubular, vaned fan blade operatively connected thereto;

an air inlet at said proximal end of said tubular projection and a plurality of air outlets spaced about said tubular projection; and

a base operatively attached to said housing for attachment to a power supply.

6. The heat sink of claim 5 wherein said heat conductive body is substantially conical.

7. The heat sink of claim 6 wherein a plurality of heat radiating fins project from said heat conductive body.